Cash register



1952 E. G. YACKLEY ETAL 2,581-463 CASH REGISTER Filed Sept. 14, 1948 10 Sheets-Sheet l gin/UM Edward 6. Yack/ey Norman L. Young Earl H. Kunz Jan. 8, 1952 E. G. YACKLEY ETAL 2,531,463

CASH REGISTER Filed Sept. 14, 1948 10 Sheets-Sheet 2 Edward 6. Yac/r/e y Norman L. Young Earl H Kunz 3M ,dw ifm Jan. 8, 1952 E. e. YACKLEY EI'AL CASH REGISTER 10 Sheets-Sheet 3 Filed Sept. 14, 1948 WM? nz mww M K GLH.

r 0 Wm wn W Mv XWW 1952 E. s. YACKLEY ETAL 2,581,453

CASH REGISTER Filed Sept. 14. 1948 10 Sheets-Sheet 4 Fig. 4

Edward G. Yac/r/e y Norman L. Young Earl H. K Unz Jan. 8, 1952 E. G. YACKLEY EIAL 2,531,463

CASH REGISTER Filed Sept. 14, 1948 10 Sheets-Sheet 5 249 Fig. 2/

wvs/vrms Edward 6. Yac/r/e Norman L. Young Earl h. K 002 MM,%M

A flamers Jan. 8, 1952 E. G. YACKLEY ETAL CASH REGISTER 1O Sheets-Sheet 6 Filed Sept. 14, 1948 IN I/E N T065 4 Homers Earl H. Kunz YJM XW Fly. .9

Edward 6. Yac/r/ey Norman L. Young Jan. 8, 1952 E. G. YACKLEY ETAL 2,531,463

CASH REGISTER Filed Sept. 14, 1948 10 Sheets-Sheet 7 INVENTORS Edward 6? Yac/r/ey Norman L, Young Earl H. Kunz A! for/lays Jan. 8, 1952 E. G. YACKLEY ETAL CASH REGISTER 1O Sheets-Sheet 8 Filed Sept. 14, 1948 m my W Z We. wmw YK m WGLH. m 1 EN my Jan. 8, 1952 Filed Sept. 14. 1948 E. G. YACKLEY ET AL 2,581,463

CASH REGISTER 10 Sheets-Sheet 5 IN VEN TORS E a Ward 6. Yac/r/ey Norman L. Young E or! H. K unz Jan. 8, 1952 E. G. YACKLEY ETAL CASH REGISTER 1O Sheets-Sheet 10 Filed Sept. 14, 1948 {NI/EN TORS Edward G. Yuck/e y Norman L. Young E ar/ H KDnz M *Wm Homeys Patented Jan. 8, 1952 CASH REGISTER Edward G. Yackley,

New York Norman L. Young, and Earl H. Kunz, Dayton, Ohio, Corporation, Dayton, Ohio,

assignors to Ohmer a corporation of Application September 14, 1948, Serial No. 49,204

Claims.

This invention relates to registering or adding machines or the like, and in particular to the provision of means to convert a manually operated machine to one which is selectively motor or hand operated.

Reference may be made to United States Patents Nos. 1,708,189; 1,770,708; 1,993,452 and 2,201,319 for examples of one type of register with which the invention is concerned. In this type of register, for each denomination, there is a segment bar pivotally mounted by two spaced legs on a central shaft. When the control or release key is depressed to start the registering operation, each of the segment bars rotates downwardly to a point determined by the value of the amount key selected for each particular denomination. In addition, there are similar segment bars for the clerk's bank of keys and for the release key bank. Each of the segment bars, besides rotating downwardly due to their own weight, are urged downwardly by springs or the like to assure that the segment bars and associated elements will not lag behind a gravity bar, which restrains them during their downward movement until they are stopped by their respective depressed keys. On its return stroke the gravity bar re-engages the segment bars and returns them to zero position. The aforesaid springs and segment bars furnish enough power by themselves to lower the gravity bar until the bars are stopped by their keys. After all the segment bars have stopped however, the motor or hand drive must power the gravity bar to the end of its stroke and then through its return stroke. Hence when a motor drive is applied. there is a very great tendency for it to overspeed during the initial stroke of the gravity bar, resulting in bouncing of the indicator drums, etc. By means of our construction however, this tendency to over-speed is eliminated, resulting in smoother operation throughout each cycle, even though a "universal alternating or direct current motor is used, which type of motor is subject to poor speed regulation within itself.

With the register driven by the motor, misuse of certain controls by the operator would cause the register to jam and we have provided means to prevent the jamming of the machine in this manner.

It is therefore a primary object of our invention to provide a new and improved cash register selectively operable by motor or by hand.

A second importan object of our invention is the provision of a motorized drive for a register wherein the motor speed is controllable to operate the register at a speed which will not be so high as to bounce and jar the mechanism, but yet will be sufiiciently rapid that there will not be any delay in the operation of the register.

Another important object is the provision of novel and improved mechanism to prevent the intended or accidental jamming 01' the register by improper handling of the controls.

Other objects will become apparent as the description proceeds in connection with the accompanying drawings, wherein:

Figure l is a perspective view of a register embodying the invention;

Figure 2 is a. perspective view from the rear and side, of the register of Figure 1 but with its casing removed;

Figure 3 is a vertical section illustrating some of the mechanism controlled by the release bank of keys, and Figure 3a is a similar view of a portion of Figure 3, but more clearly illustrating some of the parts;

Figure 4 is a side elevation, partly in section, of the motor side of the register, showing the linkage by which the motor starting key is depressed;

Figure 5 is a perspective view of that part of the motor assembly and related parts that faces toward the inside of the register and is therefore not visible in Figure 2. A speed control mechanism is shown as a modification;

Figure 6 is an enlarged perspective view of the top of the motor and showing the speed control mechanism;

Figure 7 is a front view of the motor and housing;

Figure 8 is a bottom view of the motor and housing, partly in section along the line 8-8 of Figure 7 and looking in the direction of the arrows:

Figure 9 is a partial sectional view substantially along the line 9--9 of Figure 8;

Figure 10 is a partial sectional view showing the main motor switch;

Figure 11 is an enlarged side view of a portion of the mechanism shown in Figure 5;

Figure 12 is a view looking at Figure 11 from the left, and partly in section along the line l2-l2 of Figure 11;

Figure 13 is a view of a portion of the mechanism within the motor housing which limits the turn of the drive shaft H9 to two turns. In this view the mechanism is in the position it occupies just after the drive shaft has completed its first revolution;

Figure 14 is a view similar to Figure 13, but with the parts in their home position, where they are when the register is not being operated;

Figure 15 is an end view of the motor transmission mechanism shown in Figure 8 and also appearing in Figures 13 and 14;

Figure 16 is a vertical sectional view along lines lB-l6 of Figures 15 and 17; but with the view reversed end to end so that the elements are arranged in the same axial disposition as in Figure 8;

Figure 17 is the other end view of the mechanism shown in Figure 15;

Figures 18 and 19 are top plan, and side views respectively of an element of the motor speed control governor;

Figures 20 and 21 are side and bottom plan views of another element of the motor speed control governor;

Figure 22 is a partial longitudinal sectional view through the register, showing the release bank of keys and associated mechanism, together with. the mechanism for opening the cash drawer;

Figure 23 is a side view of a portion of Figure 22, but showing a modification;

Figure 24 is a view similar to Figure 22 but showing a second modification.

Referring to the drawings Figure 1 shows a cash register constructed in accordance with our invention. The internal mechanism is enclosed by a casing generally indicated at 30, which is removably secured to the frame 3| (Figure 2) of the register by machine screws 32. Protruding through an opening 33 in the front of the casing are vertical banks or rows of keys which. form the keyboard. The left hand vertical bank 34 are clerks identification keys, and any one of these keys must be depressed to operate the regis ter and open the cash drawer 35. The next four vertical banks 36 are amount keys, and the last or right bank 39 are release or control keys, any one of which must also be depressed to operate the register and open the cash drawer. In the release bank 39, the top key 31 is the No Sales key, the next four keys 38 are totalizer selector keys, and the bottom two keys 43 and 44 are Charge and Paid Out key respectively, although they may have any other desired designations.

Indicating drums, generally designated by the reference number 46 in Figure 2, are controlled by the keyboard, half of them being visible to the operator through the window 48 of Figure l, and the remainder of the drums being visible to the customer in the usual manner, as is apparent in Figure 2. A printing mechanism indicated generally at 50 in Figure 2, duplicates upon a record tape the amounts and indicia set up by the keyboard and indicated by the drums 46.

A hinged counter hood 52 (Figure 1) forms part of the case, to cover the totalizers (not shown) which are selected by the totalizer selector keys 38, and is normally closed as shown, its opening being under the control of a master lock key 55 and rectilinearly movable handle 56.

On the right side of the casing 30 is a hinged door 51, normally locked by a key 58, through which access is gained to reload the record tape 5| or to release the cash drawer 35 without operating the register. Also shown on the right side of the register in Figure 1 is an electric cord 62 for supplying current to the register for automatic electric operation, and a crank 63 for operating the register by hand in the event of failure of electric current.

In normal operation of the register a clerks key 34 is depressed, next the proper number of amount keys, and finally one of the keys 38, or else either 01' the Charge" or "Paid Out keys 43 or 44. Upon the depression of the proper key in the release bank 39 the drawer 35 will open, the drums 46 will indicate the amount etc, and the printing mechanism 50 will record the indication upon the record tape 5!. When it is desired to register a No Sale" item the amount keys should not be depressed since the depression of any one of them prevents the operation of the 4 "No Sale" key 37. There is no motor bar to be depressed, because the depression of any key in the release bank 39 actuates the register, as will become apparent.

Reference may be had to the Paden patents, No. 1,708,189 for details of totalizer selection and operation; No. 1,770,708 for details of drawer operation; No. 1,993,452 for the printing mechanism, and No. 2,201,319 for other details, all of these patents relating to a type of register to which the invention is applicable.

The details of construction by which depression of the keys results in the setting up of the amounts in the indicator and printer and in the totalizers is well known to those skilled in the art, and are shown in Figure 3, as Well as in the aforementioned patents, a general description of their operation being sufficient for the purpose of this application.

Referring to Figures 2 and 3 there are six segment bars 61 in nested relationship, each bar having a forwardly extending leg on the motor side of the register and journalled on the main shaft 68 (Figure 3) which extends transversely through the register, being fixed in the vertical members 69 of the register frame. The other ends of the segment bars 6'! are afiixed to the segments 66 (Figure 3) which are journalled on the main shaft and stopped in their correct positions by the depressed keys when the register is worsted. Movement of the segments is translated to the racks in (Figures 2 and 3) which in turn are geared to the indicating drums 46. The indicating drums 46 visible in Figure 1 are directly driven by the racks ll) while those visible from the back of the machine are driven by racks H (Figure 2), the latter being connected to racks '10 by rods 12 and pinions 12a (Figure 3).

Also visible in Figures 2 and 3 are the extensions or arms 13 one of which is secured to each of the adding wheel gears 74 so that the adding wheel gears will follow the movement of the individual segment bars 61, to add the registered amounts into the totalizers or counters, in the manner disclosed in the aforesaid patent No. 1,708,189.

The printing mechanism 50 includes a series of printer type segments [5 (Figure 4) rotatable about main shaft 68, there being one for each of the segment bars 61, and fastened integrally to forward extensions 71 on said bars for movement therewith, by means of arms 16, integral with the printer type segments.

All of the described elements are spring biased clockwise as viewed in Figures 3 and 4 by springs including the tension springs 8i (Figure 2), one for each of the racks l0, and which urge the racks downwardly, as well as by springs 84, Figure 3, connected to the four adding wheel gears T4 and also to the inner and outer segment bars 61 so that if there were nothing to restrain them they would be at the end of their clockwise stroke and the indicating drums 4 6 would indicate 99.99 as in Figure 2. The extent of their movement .in the clockwise direction during any registering operation is determined by the keys that have been depressed. They are returned to their zero positions by the upward or counterclockwise movement of the gravity bar 18 which is journailed for rotation on the main shaft 68 by its legs 19 (Figure 2).

The gravity bar 18 has secured to it, as by a screw 8i} (Figures 2* and 3) a portion 83 of a control arm 82 which control arm extends substantially radially toward the main shaft 68 upon which it is journalled for rotation. This control arm 82 underlies and engages all of the nested segment bars 67, so that they cannot move clockwise under the influence of their biasing springs until the control arm 82 is moved clockwise, and upon return movement of the gravity bar the control arm 82 picks up the segment bars from the places they have stopped, and returns them to their zero position.

Referring to Figure 2, an electric motor within motor housing 85, operated under the control of the keys in the release bank 39, serves to rotate the gravity bar 18, first clockwise, to the end of its stroke, and then counterclockwise back to its initial position in which it is shown in Figures 2, 3 and 4, by mechanism which will be described. In the event of power failure the crank 63 may be inserted and turned by hand to accomplish the same purpose, mechanism within the motor housing 85 preventing the operation of the crank until a key in the release bank 39 is depressed. Two complete revolutions of the crank are required to drive the register through a complete cycle.

Referring to Figures 3 and 4, an arm 8! is pivoted upon the main shaft 68 and is urged clockwise by a tension spring 88 (Figure 4). The arm 81 is however held towards the left by a bellcrank pivoted on a shaft 89 and having one leg 90 which engages a roller 92 on arm 81 to block rotation of the arm. The other leg 94 has a pin 55 (Figure 3) thereon which, in this first embodiment, is engaged in a notch 96 formed in an extension 91 of a release plate or cam member 98 rotatably journalled on the main shaft 58. Each of the keys in the release bank 39 has a pin I!!! that engages in an inclined peripheral slot I02 in the release plate 98 when the key is depressed. Thus, depression of any key in the release bank 39 rotates the release plate 98 clockwise, and the pin 95 rotates the bell crank counterclockwise whereupon the leg 98 rides off the roller 92 to permit the arm 81 to move clockwise under the influence of spring 88. In another embodiment, which will be described later, the release plate 98 is in two relatively movable parts for a purpose to be described.

As shown in Figures 2 and 4, the spring 88 is connected to one end of a lever I04 fixed on a rotatable shaft I05. A lever I06, also fixed on the shaft I85, is connected by a link In! (Figure 4) to the outer extremity of the arm 31, thus completing the linkage to transfer the force of spring 88 to the arm 81. The other end of the spring 88 is affixed to a point on the motor housing 65.

Figures 2 and 4 also show a lever I09 fixed on the shaft I05 and connected to one arm III! of a bell crank by a link III. The other arm II2 of the bell crank is connected to the upper end of a motor starting key H3 which is mounted for vertical sliding movement within the motor housing 85 by means of two pins IM (Figure 4) that pass through vertical slots H5 in the key. Thus, as the arm 81 is released for clockwise rotation under the influence of spring 88, the rotation of shaft I85 results in the simultaneous rotation of hell crank arms H0 and H2 and the depression of the motor starting key I I3. As will be described, depression of the key results in the operation of the motor in housing 85, or else releases latching mechanism within the housing to permit the crank 63 to be turned through two revolutions to operate the register if the electric power has failed.

Referring to Figures 2, 5, 8, 9, 13 and 14, a drive shaft H9 is transversely journalled for rotation in the motor housing 85. When crank operated, the drive shaft is actuated from the crank through the 1 to 1 ratio gears I29 and I2I (Figure 2) The gear I is affixed to the drive shaft II9 and gear I2I is rotatably journalled on the exterior of a hollow stud I22 (Figure '1) affixed to the wall of the motor housing 85, which hollow stud also journals for rotation the shaft of the removable crank 63. A spring I23 (Figure 7) mounted on the motor housing passes through a notch in the wall of the hollow stud I22, and when the crank 63 is inserted the spring engages a peripheral notch in the crank shaft to retain it in position in the stud. Whether the drive shaft I I9 is crank or motor operated, it is rotated through two revolutions, and stopped by mechanism which will be described. Referring to Figure 5, the other end of the drive shaft H9 protrudes through the other side of the motor housing 85, and also through a mounting plate I24 which is secured to the opposite wall of the motor housing 85 as by bolts I25. On the outside of the mounting plate I24 there is a pinion gear I26 suitably keyed to the drive shaft II9, the plate I24 having an opening I26a (Figure ll) for the passage of the entire pinion gear I26.

A stud shaft I2! is rigidly fixed to the mounting plate I24, protruding only from the right side thereof, as viewed in Figure 12. A spur gear IE8 is rotatably journalled upon the stud shaft 521, and is driven by the pinion gear I26 at a speed one-half that of the pinion gear. In order to extend the bearing surface of the gear I28 upon the shaft I21, the gear is provided with a hub I23 (Figure 12) which is suitably welded to the gear I28 so as to be integral therewith. On the opposite side from the hub I29, the gear has thereto, as by rivets I38. a cam plate I3I which is of larger diameter than the spur gear I28. The plate has a central bore that is substantially larger than the diameter of the stud shaft Iti, and the stud shaft does not protrude beyond the outer face of the cam plate. The rigid assembly of spur gear I28 and cam plate I3I is kept from sliding off the stud shaft I2! by a retaining ring I32 which slips over a peripheral groove in the stud shaft.

The cam plate |3I is provided with a peripheral notch I33 formed by two inclines I35 and I36 meeting at a low point IB'I. A cell crank I38 is plvotally mounted upon a fixed pin I39 protruding from the mounting plate I24 and it is resiliently urged in a counterclockwise direction by a tension spring MB (Figure 5i. the other end of which is attached to the other end of the motor housing structure. The other arm of the bell crank carries a roller MI. In Figures 5 and 11 the cam plate I3I is shown in its home" position, or the angular position that it occupies when the register is at rest, When in that position the roller I is resting against the low point I31 of the notch I33 in the cam plate. The purpose of the bell crank I38 and the pcripheral notch will be described later.

The cam plate I3! carries fixed to its outer surface a crank-pin M2 and a connecting rod or link I has one end mounted on the crank pin. When the cam plate is in its home position the crank-pin I42 is in the position shown in Figures 5 and 11. The crank-pin also appears in its home position in Figure 4 where the link M5 is shown to have its other end connected to a drive lever I46 by a pivot stud I41. In Figure 4 as well as in Figure 22, the circular path of the axis of crank pin I42 is shown at I43. Referring still to Figure 4, the drive lever I46 is somewhat triangular in shape, with one apex being mounted upon the main shaft 68. The other apex lies alongside a leg 19 of the gravity bar 18 where it has a slot I46 extending radially of the main shaft 68. An eccentric bushing having a hexagonal head I 48 passes transversely through the slot I48. The bushing has the same diameter as the slot, but the bushing has an off-center bore therethrough by which means it is journalled upon a screw I50. When the screw I50 is loosened the bushing may be rotated by turning its head I 39, thus shifting the drive lever I46 angularly about the drive shaft 68.

The adjustment provided by the bushing is for the purpose of assuring that the gravity bar 18 is in its home position, at the top of its stroke, at the same time that the crank pin I42 and the notch in the cam plate ISI are in their home positions. After the adjustment has been made, the drive lever I46 is securely clamped in its adjusted position to the leg 19 of the gravity bar by the screw I56, which is threaded into a tapped hole in the leg 10. This adjustment has to be made only during the final assembly of the register, and once made, a tapered hole is drilled through the drive lever I46 and the leg 19, and a tapered pin II (Figure 4) is driven into the hole to fix the drive lever and leg against relative movement.

For every complete operation of the register, whether by motor or by hand, the cam plate I3I rotates through exactly one revolution, counterclockwise as viewed in Figure 5, and clockwise as viewed in Figure 4 (where only the crank pin I42 is shown). Referring still to Figure 4, as the crank pin I42 rotates clockwise, because of the connection provided by the link I45, pivot stud I41, and the drive lever I46, the gravity bar 16 is also rotated clockwise to the end of its stroke which occurs when the crank pin I52 has moved 180 degrees from its home position. When the gravity bar has reached the end of its stroke, all of the segment bars 61 (Figures 2 and 3) together with the adding wheel gears 14 will have followed its rotation unless they have been stopped sooner by the depressed keys in the key banks. The printer type segments 15 (Figure 4) will have assumed positions corresponding to the keys which have been depressed, and the indicating drums 46 will indicate the keys that have been depressed.

During the second half of the revolution of the crank pin I42, the printer platen (not shown) will move the record tape 5| (Figure 2) against the printer type segments I5 to record the indication of the drums 46. The selected totalizer (not shown) will be pulled into engagement with the adding wheel gears 14 to add the indicated amount into the totalizer during the return rotation of the adding wheel gears. Near the end of the second half of the revolution. the depressed keys of the keyboard will be released by mechanism to be described.

In the former manually operated machine a tensioned spring was effective to drive the register through the same operations as are now accomplished during the first half of the rotation of crank pin I42. The remainder of the operations, which are now accomplished during the second half of the revolution of crank pin I42, were accomplished by manually pushing the cash drawer 35 to closed position. During this drawer closing operation the aforemen tioned spring was retensioned so as to be ready for the next operation. Movement of the drawer to closed position was transmitted to the control arm 62 (Figure 2) and the gravity bar 18 by a cam and roller which is not needed in the motor driven register. As a matter of fact in the illustrated motor driven register, the drawer need not be closed but may be left open without interfering with the operation of the register.

The mechanism by which the drive shaft H9 is rotated through exactly two complete turns every time the register is operated will now be described. The motor armature shaft I is shown in Figures 6, 8 and 9, and as shown in Figures 8 and 9 it has an integral worm I56 that drives a worm gear I51 which is rotatably mounted upon the drive shaft II9. Referring to Figure 9, the lower end portion of the armature shaft I55 is journalled in a bushing I58. A ball thrust bearing I59 is held in engagement with the lower end of the armature shaft by means of a shoe I60 and thrust bearing spring IEI which is retained within the bore of the bushing I58 and against the shoe I60 by a plug member I62.

Since the worm gear I51 rotates freely on the shaft IIS, the rotation of the motor armature shaft I55 is transmitted to the pinion gear I26 in the following manner. Integral with the worm gear is a ratchet I63 (Figures 8 and 13-16). A bushing I66 is rigidly secured upon the drive shaft IISI by means of a tapered pin I61. The bushing has a radial flange I1I to which are secured by means of rivets I68, a cam disc I69 and a stop disc I10. A ratchet engaging pawl is pivotally mounted upon the disc I10 by a pin I12 and in the plane of the ratchet I63. The pawl has a leg I15 which is operable to engage the ratchet I63, and a second leg I16 (best seen in Figures 13 and 14) which is engageable by a camming lever I11 that is pivotally mounted upon the same stop disc I10 by a pin I18. The pawl is resiliently urged in a clockwise direction as viewed in Figures 13-15 by a tension spring I16, the other end of which is attached to a pin I carried by the stop disc I10 and passing through a slot I8I in the camming lever I11, which slot limits the movement of the cammlng lever about the pin I18. The spring I19 is sufficiently strong to rotate the pawl clockwise into engagement with the ratchet, and by engagement of the leg I16 on the lever I11, forcing the lever I11 counterclockwise about its pivot I10. However, as will become apparent, the lever can be rotated clockwise with respect to its pivot I16, and engage the leg I16 on the pawl to overcome the spring I19 and disengage the pawl leg I 15 from the ratchet.

The stop disc I10 has a peripheral notch one portion of which forms a substantially radial face I02 (Figure 13). The camming lever I11 has a hook thereon forming a substantially radial face I63 best seen in Figure 13, which is in substantially planar alignment with radial face I82 as shown in Figures 14 and 15 when the lever I11 has been rotated to disengage the pawl leg I15 from the ratchet I63. It will thus be apparent that unless the pawl leg I15 is held disengaged from the ratchet by the camming lever I11, the rotation of the worm gear I51 will be transmitted through the ratchet I63, the pawl, disc I10, and the bushing I66 to the drive shaft I I9.

Referring to Figures 8 and 16, the pinion gear I26 is not affixed directly to the drive shaft H9,

but is keyed to a bushing I86 which is" rotatably mounted on thedrive shaft. Rotation of the drive shaft is transmitted to the bushing I8$ and pinion gear by anoverload releaseolutch assembly in the following manner. L i A clutch disc I81 (Figures 8, 16 and "17) is secured to the drive shaft H9 bya tapered key I08 and has a peripheral notch 139" (Figure 1'?) having tapered sides. A plate F90 isintegral with the bushinglai' and carries a pair of levers I9I and I92 (Figure 1'? lpivo-tally mounted thereon bypins I93 and I04 respectively. The levers I9I andl92 are resiliently urged togetherby a connecting tension spring I90,"so asto retaii'r in the notch I09 a matin projection I91 on the lever'isl. The slopeof the walls of the "notch I89and' projection I92, and the tension of-spring IBfi'is such that normal forces requiredto oper ate the register will be transmitted from the drive shaft us to the pinion earns. However if anything happens to jam the register, orito otherwise'impose too great a load on the motor mechanism} the projection I91 will ride up out of the notch I39 andthe motor transmission mechanismand drive shaft- II9 can-continue to complete their designed two complete turns 'witm out suffering injury; i "The mechanism by which the drive shaft I I9 is driven through two turns by the motor; or released and operable through two turnsby the crank 'fifl'will now be described As previously described, the'de'piession of a key inthe control key-bank 39 has as one result the downward slidingmovement'of the starting key H3 (see Fig: ures 1'3 and 14) to the bottom of its stroke as determined by the limitof the slots I I5. Before the starting key is moved downward all of the elements of the motor drive are in the home? position shown in Figure 14. The pawl leg I15 is disengaged from the ratchet because a pawl I98 is engaging the radial faces I02 and 183 of the stop disc 110 and of the camming lever I11 respectively. The pawl I98 is 'slidably mounted upon the upper end of a lever I9 9 that is pivotally mountedupon a fixed part of the motorhousing 85 by a pivot pin 200. The pawl I98 has a vertical with a pair of pins 201 fixed thereto that proioct through slots 202 on the lever I99 and the pawl is resiliently urged to the bottom of the slots by a; tension spring 203, the other end of which is attached to a pin 204 on the lever I99; which pin projects througha slot 205 in' another lever 206 that is also pivotally mountedon the pin 200.' The lever 206 carries a pin 201 and a tension spring 208-conneots pins 201 and 204 to urge'the lever inil counterciockwise' with respect to the lever 206; which action urges the pawl I98 into the path of the radialfaces 102' and I88 whenthe transmissionis rotating, to disengage pawl leg I15 from ratchet I63 and simultaneously stop the disc I10, as will become apparent. 3

A latching lever 209' is pivotally mounted upon a fixed-pin 2-l0-and is-resiliently urged clockwise by a -spring 2H. When thaparts are in the "honle position shown in Figure 14 the right end ofthe 1ever 205 isen'ga'ged in anotch 212 near the middle of lever 209, being retained therein by -the forcfi exerted by the spring 21 I and by a tension spring 2T3, the latter spring being connected to lever 200 and tea fixed part of the motor housing 85f The main motor control switch comprises a pair oi- 'contacts 2N5 (Figure carried by resilient arms 211 that normally maintain the'oona taotsengaged to close the electric circuit to the 10 motor. However; when the register is at rest and the motor transmission parts are in'their home position (Figure 14) the right end of lever 206 engages the upper resilient arm 2 I I and holds the contacts 2I6 separated as shown in Figures 10 and 14. it

'All of the partswill remain as shown in Figure it until the register is operated by depressing a key in the release or control bank 39, resulting in the downward movement of the motor starting key H3. Just before it reaches the bottom of its stroke, apin Nil-fixed to the startingkey strikes an arm 2I9 of the latching lever 209, rotating the latching lever slightly counterclockwise and releasing' the right end of lever 206 from the notch H2; Under the iorce of spring 2l'3 the'lever 206 rotates clockwise until its right end engages a second' notclror abutment 220 on the latching lever 209. During its movement, and becauseof the pin 200 projecting through the slot 205, the lever 206 rotates the lever!!! clockwise, thus re leasing the faces I82 and I83 on the stop disc H0 and camming' lever ill from the pawl I00. spring I19 simultaneously turns the ratchet pawl to engage its leg IHi with the ratchet I03. Since the release of the lever 208 from its home position in notch '2l2 also allowed the motor main switch contacts 2"; to engage, the driving motor is also started at the same time that the transmission is conditioned to transmit the rotation of the motor armature shaft I55 to the pinion gear I20. i

In thismanner thedrive shaft H9 is rotated through its first revolution. Referring toFigures l5 and 163-43118 cam disc I59 which rotates with the drive shaft H9, has a single rise 22I that engages a follower on the lever 200, and at the completion of a complete turn of shaft N9 the rise 22I has returned the lever 206 to its home position of: Figure 14. However, the motor starting key I I3 has an integral projecting latching member 223, which when the starting key is depressed, engages one side of the pin 204 and retains thelever I99 in the position shown in Figure 13, so as to keep the pawl I out of the path of the radial faces I82 and I03. Also, the pin 2I'B on the depressed starting key II3 retains the latching lever 209 in the position shown in Figure 13, so that notch 212 will not engage the lever '200, and as soon as the cam follower 222 passes the high point of the rise 22I the lever 206 will snap back to the position of Figure 13 under the influence of spring 2I3. During the instant that the lever 206 was in the position of Figure 14 it disengaged the motor switch contacts 2H5, but this instant isso brief that there is no noticeable pause in the operation of the motor, and the motor continues-to drive the shaft I I9 through a second revolution.

It will be remembered from the previousdescription that the first turn of the shaft H9 drives the gravity bar I8 (Figure 4) to the bottom of its stroke ancl the second turn of the shaft raises the gravitybar'b'ack to its zero position. It is thereforeimperative that the cam plate i3! (Figure 5) he positivelystopped at exactly the same home position foreach operation of the register.

* During the second revolution of the shaftIIB;

and whenthe'gi'avity bar 10 is about one third of its way back to its home position, the gravity bar effects the raising of th'emotor starting key I13 back to its fully raised position of Figure 14. Thus the integral latching member 223 disen gages the pin 204 on lever I99." However, the lever 20G retains its position engaging the notch 220 in lever 209 because of the influence of springs 2I3 and 25 I. Now as the shaft H9 and cam disc I69 near the end of their second revolution the cam rise 22I rotates the lever 206 counterclockwise, the spring 208 simultaneously rotating lever I99 in the same direction, thus placing the pawl I98 in the path of the faces I82 and I83 on the disc I18 and lever I11. The pawl I98 is wide enough to engage both of these faces simultaneously. It will be noted from Figure 13 that the second leg I18 on the ratchet pawl, under the influence of spring I19, holds the camming lever I11 in such position that its face I83 is in advance of the face I 82 on the stop disc I10. For that reason the face I83 will hit the pawl I98 and disengage the pawl leg I15 from the ratchet an instant before the face I82 on the disc I10 hits the pawl I98 to stop rotation of the drive shaft H9.

The slots 202 in the lever I99 permit the pawl I98 to rise slightly upon the impact of the faces I82 and I83, the spring 203 serving to cushion the impact. Since the drive shaft has been disconnected from the motor driven worm gear I51 by the release of the ratchet I63, the motor armature can continue to rotate under its momentum, even though the switch contacts 2I6 have been disengaged by the return of lever 205 to its home position, where it is retained by its engagement in the notch 2; 2 in the latching lever 209.

The motor normally used in the register is of the "universal alternating or direct current type and is therefore subject to very poor speed regulating. Due to the fact that in this register there is little load on the motor during the first turn of th drive shaft II9 as compared to the load during the second half, the motor has a tendency to overspeed during the first turn of the drive shaft particularly if line voltages are above their normal value. The spring loaded bell crank I38 and the roller I4I operate to reduce this overspeeding because of the friction of the roller on its shaft and on the cam plate I3I, and particularly at the very beginning of the revolution due to the fact that a load is imposed upon the motor at the very start by the spring held roller I4I (Figure 11) which must be raised up the incline I35 of the notch I 33 in the cam plate I3I. After the roller reaches the top of the incline, the friction of the roller I4I on the cam plate I3I continues to be sufficient to resist the normal downward movement of the gravity bar. so that the motor must actually exert a torque to lower the gravity bar to the end of its stroke.

Another important function of the spring pressed roller MI and the notch I33 is to bring the cam plate I3I and the associated drive shaft H9 and transmission to the home position. It sometimes happens that the drive will over run due to momentum of the moving parts. In so doing, the pawl I98 (Figure 14) will be wedged against the faces I82 and I83 to the extent that spring 2I3 will not rotate lever 206 clockwise when its right end is released from the notch 2I2 in the latching lever 209. Thus the notch I33 serves to prevent such over running because after the roller I4I reaches the low point I31 (Figure 11) of the cam plate I3I it tends to prevent further rotation of all of the rotating parts past their home position. The motor circuit is opened by the lever 208 separating the main switch contacts 2l6 just as the roller I 4| enters the notch I33 and commences to roll down the incline I 38.

Fluctuating supply line voltages, which range from to volts, pose a diflicult problem because lf the frictional load applied by the roller I is sufficient to prevent too rapid descent of the gravity bar 18 when the line voltage is high, the load was too great to obtain the desired register operating speeds. If the frictional load is removed and the line voltage is high, the downward movement of the gravity bar is so rapid that the indicating drums 46 have a tendency to bounce and give erroneous indications.

Because of the relative expense of voltage regulators to keep the supply voltage constant, another device is used, comprising a governor attached to the motor armature shaft and efiective to pulse the input voltage to the motor if the motor reaches a maximum desirable speed. The assembled speed control mechanism is shown in Figures 5 and 6, and certain details in Figures 18 to 21 on the same sheet.

A breaker point assembly generally indicated at 228 comprises a pair of spaced insulating blocks 221 and 228 mounted on a bracket 229 secured to a motor housing mounting bracket 230. A flexible metallic leaf spring type breaker point arm 23I is rigidly secured at one end to the block 221 and has an electrical lead 232. The flexible arm 23I crosses the axis of the motor armature shaft I55 but is spaced above it, and the unsecured end of the arm has a conventional breaker point contact 233 which normally engages a similar contact 234 on the block 228 and is electrically connected to the lead 235. The breaker point assembly 226, through the leads 232 and 235, is in series with the main motor control switch formed by the contacts 2I6 of Figure 10, so that both sets of contacts must be engaged in order to supply current to the motor. Contacts 233 and 234 are bridged by a suitable condenser 238 (Figure 5) and the contacts 2I6 are bridged by another condenser 239. When the motor speed exceeds a certain value the breaker point arm 23I is automatically flexed upward by means which will be described, to open the contacts 233 and 234 until the motor speed has reduced to the correct value.

Referring to Figures 6 and 18 to 21, a stud 248 having the same diameter as the upper end of the armature shaft I55 is threaded into the upper end of the shaft to form an extension thereon. A disc 24I is pivotally mounted upon stud 240 on a diameter thereof, by a pin 242. The disc 24I can therefore flop about its axis 242, but as the motor armature speeds up centrifugal force will tend to maintain the disc in a plane at right angles to the axis of the armature shaft. As best shown in Figure 18, the disc 24I has a central elongated opening through which the stud 248 passes, so that when the disc is assembled on the stud there are two diametrical openings 243 and 244 in the disc.

A second upper disc 245 has a pair of downwardly depending legs or tangs 248 and 241 which are of such transverse cross sectional dimensions that they slip freely through the openings 243 and 244 in the pivoted disc MI, and hold the upper disc in axial alignment with the stud 240 while permitting free movement of the upper disc 245 axially of the stud. The legs 248 and 241 have sufficient clearance with respect to the outer curved surfaces of the openings 243 and 244 in disc I so as not to interfere with the free pivoting movement of disc 24I about the pin 242. Ad- Jacent its periphery, and on the same diameter as the less 246 and 241, the upper disc 245 has a downwardly extending lifting stud 245, which because of the free vertical sliding movement of the upper disc on the stud 240, will tilt the lower disc about its pivot pin 242 as shown in Figure 6. The weight of the disc 245 and its integral elements is such as to depress the disc 2 4l in this manner. and even to keep it slightly depressed at high motor speeds in spite of the effect of centrifugal force which acts to urge the lower disc 24! to rotation in a horizontal plane.

It will be apparent that the vertical position of the upper disc 245 upon the stud 245 will depend upon the motor speed and this movement is used to pulse the current supply to the motor as will be exlained.

In order to counter-balance the weight of the lifting stud 248, the upper disc 245 is provided with a Weight in the form of an upwardly extending stud 249 on the diametrically opposite side from the stud 248. An insulating cap member 250 projects above a flange 25! integral with the upper disc 245, the cap being press fitted into a recess in the flange.

The breaker point arm 23! carries a cylindrical stud member 254 which has a transverse slot 255 by which it is slipped over the arm 23 I The slot should be narrow enough so that there will be a press fit between the stud and arm to retain the stud in fixed position on the arm. The stud is coaxial with the motor armature shaft l55 etc. An adjusting screw 255 is threaded axially through the stud 254 and is adjustable axially therein by turning it with a screw driver engaging a slot in the top thereof. Once adjusted to proper axial position it is locked in position by a nut 251. At its lower end the screw 255 has a head 255 which is engaged by the insulated cap member 250 when the motor runs beyond a desired speed. The vertical force exerted by the cap member 255 will push up on the screw 255 and lift the arm 23I to disengage the contacts 233 and 234, thus stopping the power supply to the motor until it slows down again to the point where the pivoted disc 24! allows the upper disc to drop and close contacts 233-434 again.

Adjustment of the speed control is readily accomplished while the motor is running. With the aid of a speed indicator to measure the motor speed it is adjusted to a speed of approximately 8150 R. P. M. This motor speed will operate the register about 55 times a minute. Thus in a normal operation, after the proper key in the release bank has been depressed, the register will operate through a complete cycle in a little over one second. This has been found to be a satisfactory speed. and one wherein there is no overspeeding or bouncing of the register mechanism.

Referring to Figures 3 and Be, it will be remembered that in that embodiment the release plate 98 has a rearward extension 91 having a notch 95 therein, which engages a pin 95 on the bell crank 95-94. and that when a key in the release or control key bank 39 is depressed it will cam the release plate 98 clockwise. The bell crank 5l|-94 is thus rotated counterclockwise to release the arm 81 and close the motor switch.

Another bell crank having substantially radially disposed arms 259 and 250 is pivotally mounted upon the shaft 89, being urged in a clockwise direction by a tension spring 25!. The arm 259 of the bell crank has a pin or roller 252, that when the arm 81 is in the home position. engages a curved face 253 (Figure 3a) on the arm. The arm 259 of the bell crank is bent laterally so as to engage the underside of the arm 95 of the bell crank 94. Thus, as described in Patent 2,201,319, counterclockwise rotation of bell crank 94 results in counterclockwise r0- tation of bell crank 259-259. The pin 252 is thereby disengaged from the curved face 253 and is rotated to a. position to the right of an abutment 254 on a dog leg 255 integral with the control arm 82.

As the control arm is rotated clockwise by the motor, the abutment 254 engages the pin 252 and rotates the bell crank 259-250 counterclockwise until the pin 252 rides up the abutment and onto a circular peripheral surface 255 at the extremity of the dog leg 255. By the time the gravity bar 18 and the integrally connected control arm 52 reach the end of their downward stroke the pin 252 has run off of the peripheral surface 255 and lies in front of the dog leg 255. On the return stroke of the gravity bar the front face 258 of the dog leg engages the pin 252 and rotates the bell crank 259-255 clockwise and back to its initial position where it is shown in Figures 3 and 3a. At the same time that the pin 252 is moved clockwise by the face 255. the pin engages the rear face of the arm B1 and turns it counterclockwise back to its home position of Figures 3 and 3a, against the action of spring 88 (Figure 4). This results in the simultaneous raising of the motor starting key H3 (Figure 4) and thus the opening of the main motor switch contacts 2I5 (Figure 10). As previously described. this opening of the main motor switch occurs about the time that the roller I (Figure 11) starts to travel down the incline I35 of the notch in the cam plate I3l.

After the front face 259 of the dog leg 255 has turned the pin 252 to its home position and shut off the motor, the register coasts until the dog leg 255 is in the relative position shown in Figure 3a, and the roller l4! rests against the low point I31 in the notch I33. All of the elements of the register have thus been returned to their home position.

The mechanism shown in Figure 22 relates to the release key bank 39, and associated mechanism, together with the drawer release mechanism and the pivoted control arm 210. As described in the previously mentioned Patent No. 1,770,708 to Paden, the pivoted control arm 2') is positioned in any one of three positions about its mounting shaft 21 I. When in the normal position shown in solid lines in Figure 22 the control arm 215 permits normal operation of the register in the manner so far described. When the control arm is rotated to the position shown in dotdash lines at 219a it releases the counter hood 52 (Figure 1) so that the departmental totalizers are exposed to view. As described in the Patent 1,700,708 the depression of one of the clerks keys 34, followed by rotation of the control arm 215 to the position at 21541 results in the opening of the cash drawer 35, the unlatching of the counter hood 52, and the setting of the indicating drums 45 to indicate that the totals are being read. In the present machine the drawer is also opened at the same time, but in a different manner. by mechanism shown in Figure 22. Also, in the present machine, since the aforesaid rotation of control arm 210 to the position at 210a results in the operation of the motor drive through a complete cycle, the printing mechanism is also operated to print upon the record tape 5| (Figure 2) the same figures that appear upon the in; dicating drums l5.

The position of the control arm 210 is determined by the rectilinearly movable handle 56 (Figures 1 and 22) which is attached to the easing 30 of the register for sliding movement from the lower position shown in solid lines in Figure 22 to the upper dotted line position 5611 in the same figure. The handle 56 has integral therewith a vertical ear 212 having an inclined slot 213 therein which receives a pin 214 fixed to the control arm 210. From Figure 22 it will be seen that as the handle 56 is moved from its lower position to its upper position 56a the slot 213 will, by means of the pin 214, rotate the control arm counterclockwise to its position at 210a. A spring 215 resiliently urges the handle 56 to its normal and lowermost position, and before it can be moved away from this normal position the master lock key 55 must be turned to the proper position to remove an obstructing lock bolt (not shown). When the key 55 is removed the handle is locked in its lowermost and normal position, so that the register can be used only for registering operations.

The key 55 is also positionable to an intermediate position whereby the handle 56 can be pushed up and locked in an intermediate position 55b, thus rotating the control arm 2?!) to an intermediate position wherein it locks the register against any operation. When the control arm 210 is in such intermediate position, a lip 216 adjacent its right hand end has been so positioned in front of a pin 211 on a depending leg 210 of the release plate 98 that it blocks the release plate 98 against the clockwise rotation that is required for operation of the register.

As shown in Figure 22, the cash drawer 35. which is moved to the left to open position by springs (not shown), is latched in closed position by a latch lever 218 which is pivoted on a shaft 280 and engages an abutment ZSI on the drawer to hold the drawer closed.

In Figure 22 is shown the mechanism which releases the drawer as the result of operation of the motor drive, or alternately by the use of the crank 63, both of which result in moy ement of the crank pin I42 through one revolution. In Figure 122 is shown the crank pin I42 and a dot-dash circle M3 showing the path of the axis of the crank pin during one revolution. Shown at 232 (see also Figure 2) is a shaft, mounted for rotation in the frame of the register, and having fixed to its inner end a drawer release lever arm 285. Fixed to the outer end of the shaft 282 is a manual drawer release lever arm 286 (see also Figure 2). Intermediate the lever arms 285 and 286, and in the same vertical plane as the connecting rod or link M5, is a motor driven drawer release and key resetting lever arm 281, also fixed to the shaft 282.

The lever arm 281 is somewhat hook-shaped in profile, as viewed in Figures 4 and 32, and has two cam follower surfaces 288 and 289, lying in the same plane as the connecting rod I45. In Figure 22, the crank pin M2 and rod I45 are shown in solid lines in their "home position. and rotation of the crank pin is clockwise. During such rotation the rear curved edge 290 of the rod I45 serves as a cam. Shortly after the crank pin starts its cycle of rotation the edge 290 engages the follower surface 288 and rotates the lever 281 clockwise against the tension of a spring 29L This results in clockwise movement of the lever 28.1, shaft 232 and the drawer release lever arm 285, the lever 231 reaching the extreme clockwise position shown in dotted lines at 2010..

10 A pin 292 on the drawer latch lever 2.19 lies in the path of the lever arm 285, so that rotation of lever 285 moves the pin up to the dotted line position 292a, lifting the latch lever 219 from engagement with the abutment 28I and releasing the cash drawer 35.

After the rear curved edge 299 release the lever 281 the latter returns to its normal position shown in full lines in Figure 22. As the crank pin I42 continues its rotation the control arm 82 (Figure 3) and other associated mechanism previously described, are driven through their normal cycle of operations until the crank pin I42 again reaches its home position.

an elongated yoke is formed to have spaced legs 25S and 291 (Figure 22) integrally connected by a transverse strap 298, the entire yoke being mounted for pivotal movement upon a shaft 299. The leg 296 carries a pin 300 that is engaged in a slot 3M at the bottom of the depending leg 218 of the release plate 98, so that when the release plate is rotated clockwise by depression of a key in the release key bank 35 the yoke with its legs 2% and 291 will rotate counterclockwise, the pin Sill] moving to the position shown at 300a. The other leg 29? has a pin 302 by which a link 303 is pivotally connected to the leg 291, the other end of the pin having a pin or roller 394 that rides upon the top edge of the latch lever 219.

When the register is in the home" position the pin 30s rests upon a rise 305 on the latch lever, but when pin 300 is moved counterclockwise to the position at 300a the pin 304 is pulled to the right by the link 303 and falls into a depression 356 adjacent the rise 305. The pin 304 supports an elongated key releasing the yoke 301 that extends transversely of the register and engages the bottoms of the legs 308 of the key looking or detent plates 309, which plates are pivotally mounted on the main shaft 68. The yoke 301 is pivotally supported upon the shaft 299 by a pair of upwardly extending integral ears 3 if], only one of which appears in dotted lines in Figure 22. Each of the vertical rows of keys shown in Figure 1 has a detent plate 309 and when a key in any of the rows is depressed, a pin 3II on the key moves the respective detent plate 30.9 clockwise until the pin clears an incline 3I2, after which the detent plate drops back to lock the key in depressed position. In every vertical bank except the release bank 39 a depressed key can be released by depressing another key in the bank, but once a key is depressed in the, release bank 39 it cannot be raised again since its depression results in the rotation of the release plate 98 and operation of the register. Simultaneously with the rotation of the release plate and the consequent rotation of the yoke having the legs 2% and 291, a transversely extending strap member 3I3, integral with the said yoke, rotates to a position where it blocks the release of the keys in the clerks key bank 34 or the amount key banks 36 until the register has nearly completed a cycle of operation. The latch plates which are so actuated by the blocking strap member 313, and the rear legs on the latch plates 309 which are also blocked by it are not shown in the drawings, but may be seen in Figure 1 of the Paden Patent 1,708,189.

Referring again to Figure 22 where the latch lever 215 and the key releasing yoke 301 are shown in their "home positions, it is seen that if the latch lever 219 is raised it will lift the yoke 301 androtate the detentplatesiflfl to unlatchthe keys. However, since the-linkifl has movedthe,

17 pin 39! into the depression 396 before the latch lever 219 is lifted by the drawer release lever am 285 to open the drawer, the lifting of the latch lever 219 will not raise the yoke 391 sufficiently to release the keys.

However, as the crank pin M2 continues its rotation, the rear curved edge 299 of the rod I45 strikes the other cam follower surface 289 on the lever arm 2B1, again causing lever arm 295 to engage the pin 292 and raise the latch lever 219. Before this time however, the control arm 82, in returning to its home position, has returned the release plate 98 to the home position, resulting in the movement of pins 399 and 394 back to their home positions. Thus at the time that the latch lever 219 is raised the second time the pin 394 is again resting on the rise 395, and the strap member 313 has been removed from its blocking position with respect to the rear legs (not shown) of the detent plates 399. Therefore when the link I65 strikes the follower surface 239 to raise the latch lever 219 the pin 394 will turn the transverse key releasing yoke 391 clockwise, with the result that it pushes upwardly on the legs 398 of the detent plates 399 to rotate the detent plates clockwise and release all of the depressed keys.

As previously described, in connection with Figures l3 and 14, although return of the release plate 98 to home position results in the raising of the motor starting key H3, the main switch to the driving motor is still closed until the drive shaft has made almost two complete revolutions. Consequently, the drive motor is still operating at the time that the rod 145 engages the cam follower surface 239 in Figure 22, and for a time thereafter.

Still referring to Figure 22, it will be seen that if the control arm 219 is held depressed in its counterclockwise dot-dash line position the slot in its right end will not permit the pin 211 and consequently the release plate 98 to return to their home positions. This will lock the register in an uncompleted cycle position. because the overload clutch i Figure 17) will disengage and permit the motor and transmission to complete their cycle while the register remains locked. Such an occurrence may come about through either accidental or intended abuse of the handle 56, by

pushing it up to the position shown at 53a and forcefully holding it there, either during a total reading operation or by pushing it up at the same time that a key is depressed in the release bank 39 during an ordinary registering operation.

In order for the control arm to be returned to home position by the register, the pin 2" would have to cam the car 212 downward against the combined forces of friction and the pressure exerted by the operator.

In Figure 23 is shown one embodiment of safety means which will enable the register to complete its cycle even though the operator holds the handle 53 in the upper position 56a. Here the control arm 311 has the same outline in profile as has the control arm 219 of Figure 22. However it has a lateral offset formed by a bend in a vertical plane at 3l9. so that its portion to the right of the bend 31B lies in a vertical plane behind that of the portion to the left of the bend. Pivoted upon the same shaft 2' as the control arm 3H, and lying in the same vertical plane as the right end portion of the control arm 3, is a shorter auxiliary arm 3l9, having a curved slot 329 in juxtaposition with a similar slot 321 in the arm 9H for the passage of the shaft 289. The pin 32| which corresponds to the pin 214 of Figure 22 is carried by the auxiliary arm 319, and is formed by a rearward extension on a screw member threaded into the auxiliary arm 3I9 and having a cylindrical head 322. The head 322 lies in the plane of the left hand portion of the control arm 3 I1, which has an arcuate slot 323 therethrough to receive the head. The auxiliary arm 3I9 is movable about the shaft 21l relatively to the control arm 3", but its movement clockwise is limited by the upper limit of the slot 323, which forms a stop for the screw head 322. It is urged clockwise with respect to the control arm 3l1 by a tension spring 324 which is stretched between a pin 325 on the control arm 3H and another pin 326 on the auxiliary arm 3l9, the pin 326 extending underneath and past the control arm 3".

The embodiment shown in Figure 23 operates in the same manner as the one shown in Figure 22. However, when the control arm 311 is depressed by the handle 56 and engages the pin 211 in the manner shown in dot-dash lines in Figure 22, even though the pin 32! on the auxiliary arm 3 I 9 is held in depressed position by the handle 56, the control arm 311 can be rotated clockwise and back to its home position by the pin 211 because of the resilient connection formed by the spring 324 and the pins 325 and 325. The drive motor will therefore not clutch out, and the register can proceed through a complete operating cycle.

Referring again to Figure 22, the peripheral notches I92 on the release plate 98 form cam surfaces by which the release plate is turned clockwise to initiate an operating cycle when one of the keys in the release bank 98 is depressed. the corresponding pin 99 engaging in a notch as previously described. In the normal operation of the register the key is held depressed both by the notches H12 in the release plate 98 engaging the pin 99 and by the notches in the detent plate 309 engaging the pin 3| l. During the return stroke of the control arm 82 the release plate and the detent plate are actuated to release the depressed keys as previously described. It is always a key in the release bank 39 that is the last one to be depressed, since it actuates the register, and the operator normally releases his pressure upon the key as soon as he has depressed it. However, if the operator maintains his pressure upon the depressed key in the key bank 39 he can thus prevent the return of the release plate 98 to home position, and the registering mechanism will be locked in an incomplete cycle while the overload clutch (Figure 17) releases and allows the drive shaft H9 to complete its two revolutions.

One embodiment of mechanism which will prevent the jamming of the machine in the above manner is shown in Figure 24. In this embodiment the auxiliary control arm 3l9 of Figure 23 is not needed, and the control arm 219 of Figure 24 is the same as the one of Figure 22. In Figure 24 the release plate 329 is substituted for the previously described release plate 99. and it will be noted that the release plate 329 is not provided with slots for engagement with the pin 309 or the pin on the leg 94 of the bell crank on the shaft 89. It does, however, retain the pin 21! for engagement with the control arm 210 for reading the totals as described in con nection with Figure 22. An auxiliary release plate 339 is pivotally mounted upon the main shaft 33 right next to the release plate 329, and

a pin 33l on the release plate protrudes through an arcuate slot 332, being resiliently urged against the left end of the slot by a tension spring 333, the other end of which is connected to release plate 329 by a pin 334. The spring 333 is strong enough to cause the release plate and auxiliary release platesto move together under normal operating conditions, but relative movement between the two plates is permitted, limited by the length of the slot 332.

At its upper end the auxiliary release plate 330 has a vertical slot 335 which receives the pin 95 on leg 94 of bell crank 99-94. On its lower end the auxiliary release plate has a vertical slot 339 which engages the pin 390 on the leg 296 of yoke 296-291. With this arrangement it will be apparent that the register cannot be jammed by holding a key down and preventing the release plate 329 from returning to home position. When the release plate is so held, the auxiliary release plate can still move counterclockwise against the tension of spring 333, and thus the register can complete its cycle. It will also be noted that holding the release plate 329 by means of the control arm 210 and the handle 56 similarly cannot lock the register in an incomplete cycle, so that the modified release plate structure of Figure 24 eliminates the need of the modified control arm and auxiliary control arm 3I9 of Figure 23.

Referring to Figure 22, it will be noted that the holding of a key depressed in the release bank 39 will also prevent clockwise rotation of the detent plate 399, with the consequence that its leg 398 will prevent lifting of the key releasing yoke 30! to release the depressed keys in the other banks. For this reason a modified detent plate 338 is used in the embodiment of Figure 24. The peripheral detent teeth 339 are reversed so that depression of a key results in counterclockwise rotation of the detent plate instead of a clockwise rotation as in Figure 22. The release plate 339 is resiliently urged clockwise by a tension spring 349 so as to latch the pin 3 under a detent tooth when a key in the release bank 39 has been depressed. The modified detent plate is used only for the keys in the release bank 39, and it does not have 2. depending leg engageable by the key releasing yoke 301 as do the detent plates for the other banks of keys. Instead of being released by the yoke 307, the modified detent plate is turned counterclockwise to release its depressed key by means of a resilient arm 34I adjustably secured to the main control arm 92 so that during the return movement of the control arm to home position it will engage a rear edge 342 of the detent plate 338 and rotate the detent plate against the tension of spring 340 to release the pin 3| I of the depressed key. With this embodiment, the detent plate 329 is not effective to hold the pin 3 on the depressed key until the main control arm 82 has moved sufliciently to disengage arm 34! from edge 342 at the beginning of a cycle. However, this movement takes place before the operator can release the key, and the key will also be maintained in depressed condition by the engagement of a pin 99 in its notch H12 in the release plate 329.

We have thereby provided a novel cash register having a selective motor or hand driven mechanism, and the controls of the machine are so constructed and arranged that operation of the machine results only from the depression 01' any key in a register control or release bank.

No extra motor control bar or the like is required. Means are incorporated into the mechanism to prevent the jamming of the register by incorrect operation of the controls, either intentional or accidental. Speed of the operating cycle of the register is adjustable by a motor speed control that is independent of variations in the supply voltage, so that such variations cannot cause operation of the register at speeds higher than designed for normal and accurate registrations. Whether motor or hand operated the register will always operate through a complete cycle independently of the closing of the cash drawer, which closing was formerly required in registers of this type to complete a registering cycle.

What is claimed and desired to be secured by United States Letters Patent is:

1. In a register, a reciprocable control element, a reciprocable bar operable to follow the movement of said control element; selectable means for stopping said bar in any one of several selectable positions; means for indicating the position of said bar when stopped by said selectable means; an electric motor drive, said drive including a crank pin and a rod connecting said crank pin to said control element, whereby said drive is operable to move said control element in a fixed cycle first in one direction and then back to its home position; a release plate mounted for reciprocating movement away from and toward its home position, said release plate being shiftable away from its home position by said selectable means; said plate being effective to energize said motor drive when shifted from its home position; and means operative to connect said control element and said release plate during the return stroke of said control element, to move said release plate back to home position, whereby said motor drive is de-energized.

2. In a register, a reciprocable control element, a reciprocable bar operable to follow the movement of said control; selectable means for stopping said bar in any one of several selectable positions; an electric motor drive, said drive including a crank pin and a rod connecting said crank pin to said control element, whereby said drive is operable to move said control element in a fixed cycle first in one direction and then back to its home position; a cash drawer; a latch for releasably holding said drawer closed, said motor drive in its movement being operative to release said latch; a release plate mounted for reciprocating movement away from and toward its home position, said release plate being shiftable away from its home position by said selectable means;

said plate being effective to energize said motor drive when shifted from its home position; and means operative to connect said control element and said release plate during the return stroke of said control element, to move said release plate back to home position, whereby said motor drive is de-energized.

3. In a register, a reciprocable control element, a reciprocable bar operable to follow the movement of said control element; depressable keys for stopping said bar in any one of several selectablepositions; a reciprocable detent plate operable to lock the selected key in depressed position; an electric motor drive, said drive including a crank pin and a rod connecting said crank pin to said control element, whereby said drive is operable to move said control element in a fixed cycle first in one direction and then back to its home position; a cash drawer; a latch for releasably holding said drawer closed, said motor drive 

